Pulley



- 1,628,220 May 10, 1927. BERG PULLEY Filed June 18, 1925 3 SheetsSheet 1 N. BERG May 10, 1927.

PULLEY 3 Sheets-Sheet 2 Filed June 18, 1925 May 10, 1927.

N. BERG PULLEY Filed June 18, 1925 5 Sheets-Sheet 5 Mtig/IVTC Wlfi' TTONNEY Pumice a, 10, 1927. a

' "UNITED STATES 1,628,220 PATENT OFFICE.

INANS'IAD name, or cmviim m, OHIO,'ASSIGNOB BERG mac'runme coirrm, or crfiivnnmn, omo. A COPABTNEBiSHIP coxrosnn or- .aimmiw c.

DENISON AND STA!) BERG.

Application .aiea nne 18 1925. Serial in. 37,961.

The present invention relates toimprovements in pulleys and mountings therefor,

' more particularly to pulleys of the type used ings for the pulley.

' manner to insure rigidity andstrength and.

Another object of the invention is to-provide a pulley comprising a hub and a sp der portion and a pair of shells which m mounted on the hub and'spider portion in a novel to 'r'oduce a compact structure.

other'object ofthe invention is to provide, in --a belt pulley having sheet metal shells for its belt engaging surface,-improved "inean's1for supporting and connecting thecirangular cumferential ends of the shells, whereby strains due to large lumps of material falling on or conve 'ed by the belt will be re sisted without distorting the shell or afiecting its running.- I

A" further object of .the invention is to construct anim roved pulley in which'a rigid support for t e bearings is provided to maintain them in alignment so'that in the event the pulley shell becomes distorted, the rung and may; also be used invarious other caning of the pulley will not 'be afiected. The invention further aims at the provision of a novel bracket for supporting the adjacent ends of adjacent pulleys, so that thelatter may be disposed in roper relative positions, and wherein the supporting brac ets may be made from stock material and'can be made substantially in one iece. V

Other objects of the invention will be ap parent to those skilled in the art to which my invention relates from the following description taken connection withthe accompanying drawings, wherein Figure 1 is a transverse section through a conveyor'of'the belt type showing a plurality of pulleys constructed the present invention and applied thereto.

' Figure 2 is 'a detail longitudinal section,

enla taken through a pulley constructed acco to the present invent on.

Figure 3 is an and elevation of the same,

shown in Fi .accordmg to I partly broken away showing the connections for holding the shells upon the hub.

Figure 4 is a fragmentary enlarged sectional. view taken through one end of the pulley near the periphery thereof, and showing one of the centering tongues for supportmg the shells in true concentric position upon the spider. r

Figure 5 is a transver cfrag nentary tion taken through the peripheral portion of a pulley showing a modified interlocked position. r ,a

Figure 6 is a section taken at right angles "to the axis of the pulley-on the lined-6 bf Figure 5.

. Figure 7-- is a longitudinal sectionalview constructionioff the spider and shells for holding the same-in- .L

throughfa pulley, showing another modified construction of the same. a

Figure 8 is an end viewthereof, and Figure 9- is a detail view'in section showng-a modified form of bracket for supportmg ad acent pulley ends,.the dotted lines showing the pulleys'ar'ranged at an angle. one-to the other. 7

- ,Referringto the drawing? the iinproved igure as appulleys are illustrated 111 plied to a belt conveyor, whereby the latter Q is supported in a trough-like shape while running over the pulleys, but it is to beunderstood that the pulley. maybe used in connection with other types of conveyors pacities whereina light, yet strongsupporting. pulley is required, The conveyor is '1 as having a transversely,

curved frame 10 rovided with'eiid brackets 11 and intermediate brackets 12, the latter eachha'ving a. air of arms adapted to cooperate with t e adjacent arms of other intermediate brackets and with the end brackets 11 to form supp rts for the pulleys.

13, as shown. The conveyor belt 14 is mounted upon the pulleys 13 and the latterare disposed in angular .relationwith res sets such as shown in Figure 1. Thepulley comprises a spider 15 of we form extending outwardly and about a t to each other, so as to hold the belt 14 iii substantially concaved shape to carry granular or other material over a series of the pulley hub 16 which is of considerable length, and

the spider 15 is arranged mid-waybetween the ends of the hub and carries a' flat' peripheral band 01' head 17 which may be smooth on its peripheral surface, as shown in Figure 2, for a purpose which will later appear. erably of similar shape, which co-operate to form the pulley rim or wall on which the belt 14 runs. Each shell comprises an annular wall 18' and an-inwardly turned side or end wall 19, terminating in an annular flange adapted to engage or'lie against the opposite ends of the hub 16 for closing the ends of the latter and for strengthening and reinforcin the shells 18. At suitably spaced points t e end walls 19 are slitted to form tongues 21, which are bent-inwardly so that their free ends will engage the outer surface of the hub 16 (see Figs. 3 and 4), in order to center'the shells l8 upon 'the hub 16 and to prevent distortion of the shells incident to pressure, handling and the I like. The endv walls 19 are held together and clamped to the opposite ends of the hub 16 by through-bolts 22 which have heads engaging the exterior surfacesof the flange 20 at one end and provided with clamping nuts on their other ends adapted to engage the exterior surfaces of theopposite flange 20; The spider 15 is provided with slots or perforations 23 through which the bolts 22 may freely pass, as shown. in Figs. 2 and 3.. I

Within the hub 16, in each end thereof, is placed an outer cone ring 24 of tapered construction to accommodate thereagainst tapered rollers 25. The tapered where are supported upon an inner cone ring 26,-

which is mounted upon a stationary spindle 27. The spindle 27 extends outwardl in opposite directions through the ends 0 the pulley for engagement with the brackets 11,

12. -A spacing sleeve 28 of suitable lengthis fitted within the hub 16 between the outer cone rings 24-and engages therewith to hold the same in spaced relation, while the inner rings 26 are suitably flanged at opposite ends for engaging the endsof the rollers 25 and maintaining the cone rings 24 and 26 in proper alignment. The spindle'27 is supported at its opposite ends .by the bracket 11- 12 or 1212,. as the case may be, for rotatably supporting the pulley. and for. this reason the spindle 27 at each end is flattened and reduced at opposite sides as shown at 27 in order to fit in the bracket arms 12 without turning, this arrangement serving to prevent'endwise as Well as rbtative movement of the spindle.- 29 indicates as an entirety 'means for moving each inner cone .for adjusting the adjacent bearing.

Of these means, 29 indicates a sleeve member fitting over each end of .the' spindle 27 and engaglng at its inner end the adjacent inner cone 26 and arranged tomove or slide endwise on the spindle 27, and having a cap on its out r end (preferably formed in- 18 indicates a pair of shells, preftegrally therewith) and formed with an opening 29 preferably disposed axially of the sleeve. 29 indicates a screw extending throu h the opening 29 and engaging screw threads in opening 29 extending inwardly in an axial direction from the free end of the spindle. As shown the head of the screw 29 engages'the cap 29 and through the latter serves to move the sleeve member 29 inwardly to adjust'the bearing cone 26 and thereby take up for wear in the bearings. 29 indicates a spring interposed between each cap 29 and the adjacent end of the spindle 27, the purpose of the spring being to maintain the sleeve member outwardly against the screw head, thereby preventing it from moving inwardly beyond its adjusted position, and co-operating with the screw head to efiect adjustment of the sleeve member 29 when the screw is turned to move the head outwardly. To permit of the endwise movement or'adjustment of the sleeve member 29 without interfering with the arms of the brackets 11 and 12, the sleeve member is slotted at its opposite sides as shown at29'.

The adjustment means 29 are provided at both ends of the pulley, but one of them is modified to provide for the supply of'thc lubricant within the sleeve for the bearings 24, 25, 26. For this purpose one of the openings 29 is extended inwardly to form an oilduct 30 which connects at its inner end with one or more ports 31 which open through the side of the spindle and into the chamber formed between the spaced bear ings. The adjusting screw 29 that engages the adjacent cap 29 is made hollow, as shown at 32. and is extended beyond the head 29 as shown at 33, andprovided with a valved port of any desired construction whereby the lubricant may becaused to flow tongues 40. The lugs 40 are bent inwardly to. project into the channel 37 and their free ends engage with'the adjacent walls or shoulders 38. The tongues thus hold the shells 35 firmly upon the spider 36 and against outward movement.

In the modification shown in Figures 7 and 8 the spider 41 is provided with an annular, substantially V-shape groove 42 into which are rolled the inner edge portions 43. of theshells 44. The side or end walls 45 of the shells are of a size to fit over and engage the reduced opposite ends of the hub 46, the reduced ends of the hub providing shoulders 47 against which the inner marginal edges of the walls 45 hear. The sleeve members 48 and their ad'usting means are similar to the sleeve mem is 29" and their adjusting means. except that the inner end ofeach member 48 is provided with a flanged cap 48 which fits over the adjacent end of the hub to close it, the caps 48 'being of sulficient diameter for this purpose. The inner ends of the sleeve members 48 engage the inner races 48" of the bearings 48 and serve to adjust them when moved inwardly by the roin Figure 9 comprises a section of metal flat hence the pulley stock, which is substantially U-shaped with laterally bent end'portions or feet 51 for attachment to a frame, plate or the like (not shown). The intermediate portion of the I bracket is preferably rounded and its legs are spaced so as to support the adjoining ends of the spindles 27 for two pulleys. The rounded upper portion of the bracket 50 is longitudinally slotted, as shown at 50 to receive therein the oppositely faced and re duced portions of the spindle 27, the ends of the slot 50 serving as seats for the spindles. By terminating the slot at different points about the curved portion of the bracket the spindles may be arranged at the desired angle (see dotted lines in Fig. 9) or in end to end relation.

As shown in Figure 9, the lubricant may be introduced through a pipe 52 to the high pressure connection 33 or the like and such connection may extend downwardly between the vertical arms of the bracket 50.

It will be noted that in all forms of the invention the shells are supported at their opposite ends upon the hub, and at their by ner ends upon the band of the spider. This construction insures durability and revents the sides and ends of either shell om becoming distorted. Furthermore, in the event the shell becomes bent at either or both ends, no disalignment of the hearings will result; will continue to run on the spindle 27. It will also be seen thatthe hub is formed integrally with the web or spider and that the inner portions of shells or sections may be secured to the latter in various ways to provide between them an efiective connection which involves but few operations in the manufacture of the pulley.

It is obvious that various changes and 'modifications may be made in the detail of construction and design of the above specifically described embodiments of my invention without departing from the spirit and scope thereof, such changes and modifications being restricted only by the scope of the following claims.

What I claim is:

1. A ulley structure comprising a hub having intermediate its ends a spider terminating in an annular member a pair of opposed shells having annular walls disposed in abutting relation and end walls, the abutting ends of said annular walls fitting over and supported on the annular member of said spider and said end walls be ing formed with openings through which said hub extends. and means for maintaining said shells in fined relation to said annular member.

2. A pulley structure comprising a hub minating in an annular member, a pair of having intermediate its ends a spider ter- P outer portions of the hub and annular walls fitting and supported on said annular member, and means for securing the shells in fixed relation to said annular member.

3. A pulley structure comprising a hub having intermediate its ends a spider minating in an annular member, a air of opposed shells having end walls t ough which the outer portions of said hub extend and annular walls the ends of which engage with and are supported on said annular .member, and means for securing the ends of said annular walls to said member to prevent lateral movement of said shells.

4. A pulley structure as claimed in claim 3 in which the securing means com rise an annular groove formed in the perip' cry of said member and portions of said annular walls are bent to engage the walls of thegroove. y

5. A pulley structure as claimed in claim 3 in which the securing means 'com rise a substantially V-shaped ve forme in the periph of said annu ar member and the free en downwardly into engagement with the sides of said groove.

In testimony whereof,.-I have hereunto subscribed my name.

; NAN STAD BERG.

ter-

ofsaid annular walls are bent 

